"oeExcluded License" means any license requiring, as a condition of use, modification and/or distribution of the software subject to the license, that the software or other software combined and/or distributed with it be (i) disclosed or distributed in source code form; (ii) licensed for the purpose of making derivative works; or (iii) redistributable at no charge.

That includes, remarkably, Microsoft's own OSI-approved Microsoft Reciprocal License and possibly even the Microsoft Public License, according to one legal expert.